20717950

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:433

約数の個数: 48

約数和(自身を含む): 42497280

約数和(自身を除く): 21779330

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 139, 271, 275, 278, 542, 550, 695, 1355, 1390, 1529, 2710, 2981, 3058, 3475, 5962, 6775, 6950, 7645, 13550, 14905, 15290, 29810, 37669, 38225, 74525, 75338, 76450, 149050, 188345, 376690, 414359, 828718, 941725, 1883450, 2071795, 4143590, 10358975, 20717950]

約数ペア:

[(1, 20717950), (2, 10358975), (5, 4143590), (10, 2071795), (11, 1883450), (22, 941725), (25, 828718), (50, 414359), (55, 376690), (110, 188345), (139, 149050), (271, 76450), (275, 75338), (278, 74525), (542, 38225), (550, 37669), (695, 29810), (1355, 15290), (1390, 14905), (1529, 13550), (2710, 7645), (2981, 6950), (3058, 6775), (3475, 5962)]